CVE-2024-27010 (GCVE-0-2024-27010)

Vulnerability from cvelistv5 – Published: 2024-05-01 05:29 – Updated: 2026-09-02 12:49
VLAI
Title
net/sched: Fix mirred deadlock on device recursion
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: Fix mirred deadlock on device recursion When the mirred action is used on a classful egress qdisc and a packet is mirrored or redirected to self we hit a qdisc lock deadlock. See trace below. [..... other info removed for brevity....] [ 82.890906] [ 82.890906] ============================================ [ 82.890906] WARNING: possible recursive locking detected [ 82.890906] 6.8.0-05205-g77fadd89fe2d-dirty #213 Tainted: G W [ 82.890906] -------------------------------------------- [ 82.890906] ping/418 is trying to acquire lock: [ 82.890906] ffff888006994110 (&sch->q.lock){+.-.}-{3:3}, at: __dev_queue_xmit+0x1778/0x3550 [ 82.890906] [ 82.890906] but task is already holding lock: [ 82.890906] ffff888006994110 (&sch->q.lock){+.-.}-{3:3}, at: __dev_queue_xmit+0x1778/0x3550 [ 82.890906] [ 82.890906] other info that might help us debug this: [ 82.890906] Possible unsafe locking scenario: [ 82.890906] [ 82.890906] CPU0 [ 82.890906] ---- [ 82.890906] lock(&sch->q.lock); [ 82.890906] lock(&sch->q.lock); [ 82.890906] [ 82.890906] *** DEADLOCK *** [ 82.890906] [..... other info removed for brevity....] Example setup (eth0->eth0) to recreate tc qdisc add dev eth0 root handle 1: htb default 30 tc filter add dev eth0 handle 1: protocol ip prio 2 matchall \ action mirred egress redirect dev eth0 Another example(eth0->eth1->eth0) to recreate tc qdisc add dev eth0 root handle 1: htb default 30 tc filter add dev eth0 handle 1: protocol ip prio 2 matchall \ action mirred egress redirect dev eth1 tc qdisc add dev eth1 root handle 1: htb default 30 tc filter add dev eth1 handle 1: protocol ip prio 2 matchall \ action mirred egress redirect dev eth0 We fix this by adding an owner field (CPU id) to struct Qdisc set after root qdisc is entered. When the softirq enters it a second time, if the qdisc owner is the same CPU, the packet is dropped to break the loop.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-07-17 15:03 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e578d9c02587d57bfa7b560767c698a668a468c6 , < 524323f52cbfbac4fe3f8a33a8cc405fafba0d33 (git)
Affected: e578d9c02587d57bfa7b560767c698a668a468c6 , < e6b90468da4dae2281a6e381107f411efb48b0ef (git)
Affected: e578d9c02587d57bfa7b560767c698a668a468c6 , < 0f022d32c3eca477fbf79a205243a6123ed0fe11 (git)
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Linux Linux Affected: 4.2
Unaffected: 0 , < 4.2 (semver)
Unaffected: 6.6.156 , ≤ 6.6.* (semver)
Unaffected: 6.8.8 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: Fix mirred deadlock on device recursion\n\nWhen the mirred action is used on a classful egress qdisc and a packet is\nmirrored or redirected to self we hit a qdisc lock deadlock.\nSee trace below.\n\n[..... other info removed for brevity....]\n[   82.890906]\n[   82.890906] ============================================\n[   82.890906] WARNING: possible recursive locking detected\n[   82.890906] 6.8.0-05205-g77fadd89fe2d-dirty #213 Tainted: G        W\n[   82.890906] --------------------------------------------\n[   82.890906] ping/418 is trying to acquire lock:\n[   82.890906] ffff888006994110 (\u0026sch-\u003eq.lock){+.-.}-{3:3}, at:\n__dev_queue_xmit+0x1778/0x3550\n[   82.890906]\n[   82.890906] but task is already holding lock:\n[   82.890906] ffff888006994110 (\u0026sch-\u003eq.lock){+.-.}-{3:3}, at:\n__dev_queue_xmit+0x1778/0x3550\n[   82.890906]\n[   82.890906] other info that might help us debug this:\n[   82.890906]  Possible unsafe locking scenario:\n[   82.890906]\n[   82.890906]        CPU0\n[   82.890906]        ----\n[   82.890906]   lock(\u0026sch-\u003eq.lock);\n[   82.890906]   lock(\u0026sch-\u003eq.lock);\n[   82.890906]\n[   82.890906]  *** DEADLOCK ***\n[   82.890906]\n[..... other info removed for brevity....]\n\nExample setup (eth0-\u003eeth0) to recreate\ntc qdisc add dev eth0 root handle 1: htb default 30\ntc filter add dev eth0 handle 1: protocol ip prio 2 matchall \\\n     action mirred egress redirect dev eth0\n\nAnother example(eth0-\u003eeth1-\u003eeth0) to recreate\ntc qdisc add dev eth0 root handle 1: htb default 30\ntc filter add dev eth0 handle 1: protocol ip prio 2 matchall \\\n     action mirred egress redirect dev eth1\n\ntc qdisc add dev eth1 root handle 1: htb default 30\ntc filter add dev eth1 handle 1: protocol ip prio 2 matchall \\\n     action mirred egress redirect dev eth0\n\nWe fix this by adding an owner field (CPU id) to struct Qdisc set after\nroot qdisc is entered. When the softirq enters it a second time, if the\nqdisc owner is the same CPU, the packet is dropped to break the loop."
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          "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/sched: corrige el punto muerto reflejado en la recursividad del dispositivo Cuando la acci\u00f3n reflejada se utiliza en una qdisc de salida con clase y un paquete se refleja o redirige a uno mismo, llegamos a un punto muerto de bloqueo de qdisc. Vea el rastro a continuaci\u00f3n. [..... otra informaci\u00f3n eliminada por brevedad....] [ 82.890906] [ 82.890906] ============================= ================ [82.890906] ADVERTENCIA: posible bloqueo recursivo detectado [82.890906] 6.8.0-05205-g77fadd89fe2d-dirty #213 Contaminado: GW [82.890906] ----- --------------------------------------- [ 82.890906] ping/418 est\u00e1 intentando adquirir el bloqueo : [ 82.890906] ffff888006994110 (\u0026amp;sch-\u0026gt;q.lock){+.-.}-{3:3}, en: __dev_queue_xmit+0x1778/0x3550 [ 82.890906] [ 82.890906] pero la tarea ya mantiene el bloqueo: [ 82.890906] 88006994110 (\u0026amp;sch-\u0026gt;q.lock){+.-.}-{3:3}, en: __dev_queue_xmit+0x1778/0x3550 [ 82.890906] [ 82.890906] otra informaci\u00f3n que podr\u00eda ayudarnos a depurar esto: [ 82.890906] Posible escenario de bloqueo inseguro : [ 82.890906] [ 82.890906] CPU0 [ 82.890906] ---- [ 82.890906] bloqueo(\u0026amp;sch-\u0026gt;q.lock); [ 82.890906] bloqueo(\u0026amp;sch-\u0026gt;q.lock); [ 82.890906] [ 82.890906] *** DEADLOCK *** [ 82.890906] [..... otra informaci\u00f3n eliminada por brevedad....] Ejemplo de configuraci\u00f3n (eth0-\u0026gt;eth0) para recrear tc qdisc agregar dev eth0 identificador ra\u00edz 1 : htb default 30 tc filter add dev eth0 handle 1: protocolo ip prio 2 matchall \\ action mirred egress redirigir dev eth0 Otro ejemplo (eth0-\u0026gt;eth1-\u0026gt;eth0) para recrear tc qdisc add dev eth0 root handle 1: htb default 30 tc filtro agregar dev eth0 identificador 1: protocolo ip prio 2 matchall \\ acci\u00f3n redirecci\u00f3n de salida reflejada dev eth1 tc qdisc agregar dev eth1 identificador ra\u00edz 1: htb predeterminado 30 tc filtro agregar dev eth1 identificador 1: protocolo ip prio 2 matchall \\ acci\u00f3n duplicada redirecci\u00f3n de salida dev eth0 Solucionamos esto agregando un campo de propietario (ID de CPU) a la estructura Qdisc establecida despu\u00e9s de ingresar la qdisc ra\u00edz. Cuando el softirq ingresa por segunda vez, si el propietario de la qdisc es la misma CPU, el paquete se descarta para romper el bucle."
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            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: Fix mirred deadlock on device recursion\n\nWhen the mirred action is used on a classful egress qdisc and a packet is\nmirrored or redirected to self we hit a qdisc lock deadlock.\nSee trace below.\n\n[..... other info removed for brevity....]\n[   82.890906]\n[   82.890906] ============================================\n[   82.890906] WARNING: possible recursive locking detected\n[   82.890906] 6.8.0-05205-g77fadd89fe2d-dirty #213 Tainted: G        W\n[   82.890906] --------------------------------------------\n[   82.890906] ping/418 is trying to acquire lock:\n[   82.890906] ffff888006994110 (\u0026sch-\u003eq.lock){+.-.}-{3:3}, at:\n__dev_queue_xmit+0x1778/0x3550\n[   82.890906]\n[   82.890906] but task is already holding lock:\n[   82.890906] ffff888006994110 (\u0026sch-\u003eq.lock){+.-.}-{3:3}, at:\n__dev_queue_xmit+0x1778/0x3550\n[   82.890906]\n[   82.890906] other info that might help us debug this:\n[   82.890906]  Possible unsafe locking scenario:\n[   82.890906]\n[   82.890906]        CPU0\n[   82.890906]        ----\n[   82.890906]   lock(\u0026sch-\u003eq.lock);\n[   82.890906]   lock(\u0026sch-\u003eq.lock);\n[   82.890906]\n[   82.890906]  *** DEADLOCK ***\n[   82.890906]\n[..... other info removed for brevity....]\n\nExample setup (eth0-\u003eeth0) to recreate\ntc qdisc add dev eth0 root handle 1: htb default 30\ntc filter add dev eth0 handle 1: protocol ip prio 2 matchall \\\n     action mirred egress redirect dev eth0\n\nAnother example(eth0-\u003eeth1-\u003eeth0) to recreate\ntc qdisc add dev eth0 root handle 1: htb default 30\ntc filter add dev eth0 handle 1: protocol ip prio 2 matchall \\\n     action mirred egress redirect dev eth1\n\ntc qdisc add dev eth1 root handle 1: htb default 30\ntc filter add dev eth1 handle 1: protocol ip prio 2 matchall \\\n     action mirred egress redirect dev eth0\n\nWe fix this by adding an owner field (CPU id) to struct Qdisc set after\nroot qdisc is entered. When the softirq enters it a second time, if the\nqdisc owner is the same CPU, the packet is dropped to break the loop."
          },
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            "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/sched: corrige el punto muerto reflejado en la recursividad del dispositivo Cuando la acci\u00f3n reflejada se utiliza en una qdisc de salida con clase y un paquete se refleja o redirige a uno mismo, llegamos a un punto muerto de bloqueo de qdisc. Vea el rastro a continuaci\u00f3n. [..... otra informaci\u00f3n eliminada por brevedad....] [ 82.890906] [ 82.890906] ============================= ================ [82.890906] ADVERTENCIA: posible bloqueo recursivo detectado [82.890906] 6.8.0-05205-g77fadd89fe2d-dirty #213 Contaminado: GW [82.890906] ----- --------------------------------------- [ 82.890906] ping/418 est\u00e1 intentando adquirir el bloqueo : [ 82.890906] ffff888006994110 (\u0026amp;sch-\u0026gt;q.lock){+.-.}-{3:3}, en: __dev_queue_xmit+0x1778/0x3550 [ 82.890906] [ 82.890906] pero la tarea ya mantiene el bloqueo: [ 82.890906] 88006994110 (\u0026amp;sch-\u0026gt;q.lock){+.-.}-{3:3}, en: __dev_queue_xmit+0x1778/0x3550 [ 82.890906] [ 82.890906] otra informaci\u00f3n que podr\u00eda ayudarnos a depurar esto: [ 82.890906] Posible escenario de bloqueo inseguro : [ 82.890906] [ 82.890906] CPU0 [ 82.890906] ---- [ 82.890906] bloqueo(\u0026amp;sch-\u0026gt;q.lock); [ 82.890906] bloqueo(\u0026amp;sch-\u0026gt;q.lock); [ 82.890906] [ 82.890906] *** DEADLOCK *** [ 82.890906] [..... otra informaci\u00f3n eliminada por brevedad....] Ejemplo de configuraci\u00f3n (eth0-\u0026gt;eth0) para recrear tc qdisc agregar dev eth0 identificador ra\u00edz 1 : htb default 30 tc filter add dev eth0 handle 1: protocolo ip prio 2 matchall \\ action mirred egress redirigir dev eth0 Otro ejemplo (eth0-\u0026gt;eth1-\u0026gt;eth0) para recrear tc qdisc add dev eth0 root handle 1: htb default 30 tc filtro agregar dev eth0 identificador 1: protocolo ip prio 2 matchall \\ acci\u00f3n redirecci\u00f3n de salida reflejada dev eth1 tc qdisc agregar dev eth1 identificador ra\u00edz 1: htb predeterminado 30 tc filtro agregar dev eth1 identificador 1: protocolo ip prio 2 matchall \\ acci\u00f3n duplicada redirecci\u00f3n de salida dev eth0 Solucionamos esto agregando un campo de propietario (ID de CPU) a la estructura Qdisc establecida despu\u00e9s de ingresar la qdisc ra\u00edz. Cuando el softirq ingresa por segunda vez, si el propietario de la qdisc es la misma CPU, el paquete se descarta para romper el bucle."
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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